sound absorption wall panel Flame retardance: ASTM E-84 A NRC value: 0.9 as per ASTM C423 Edge: beveled or square sound absorption wall panelDimension: 600mm*1200mm*25mm, 1200mm*2400mm*25mm 600mm*1200mm*50mm, 1200mm*2400mm*50mmFacing: inherently FR fabricPanel core: high density fiberglass battEdge detail: square, beveledApplication: cinema, theater, hotel, auditorium, gym, conferece center